Prince Harry has revealed he knew Meghan Markle was The One from the "very first time" he met her.

The pair announced their engagement earlier today, and he opened up about their relationship as they stepped out as an engaged couple for the first time.

Asked if the proposal was romantic, Harry replied “Of course it was.” Asked when he knew Meghan was “The One”, he replied “the very first time we met".

Meghan and Harry were then asked how they feel.

Prince Harry and Meghan Markle are engaged (Image: Getty)

Prince Harry said he knew from the moment she met him (Image: PA)

She showed off her engagement ring (Image: REX/Shutterstock)

He said "thrilled" and she said "very happy"

They were hugging as they left and looking into each other’s eyes.

Harry met Meghan through mutual friends in London back in June 2016.

They managed to keep their relationship secret for six months.

A newly engaged Prince Harry couldn't hide his grin as he posed up with his new fiancée, who gave us a glimpse of her stunning three stone diamond engagement ring - with two stones from Diana's personal collection - for the first time after her love's secret proposal.

The newly engaged couple poignantly posed up at the White Garden in palace grounds, a spot which just this year was renamed to honour Princess Diana’s memory.

Looking delighted, the pair beamed at the waiting photographers hours who gathered at Kensignton Palace minutes after the early morning announcement.

Harry and Meghan looked very loved up (Image: PA)

They walked off hand in hand (Image: Henry Nicholls / SWNS.com)

Megan opted for white - a nod to the garden where Harry's mother Princess Diana took the boys when they were younger, it was later turned into a memorial spot for her on the twentieth anniversary of her death.

Sparkling on her finger, the diamond engagement ring holds one diamond from Botswana, a country which holds significance for the Prince and two outside stones from the personal collection of Princess Diana.

In a tweet at 10am this morning the palace said: "The Prince of Wales is delighted to announce the engagement of Prince Harry to Ms. Meghan Markle ."

It's believed that Harry would have asked his grandmother The Queen's permission before popping the question.